Brother International HL-2600CN Service Manual - Page 337

I-11 Vertically Staggered Image Phenomenon Printed image staggered in the vertical direction as shown in print sample (11) of Fig.8-2. Main Causes 1) Shock or vibration applied to the printer. 2) Failure of the optical unit 2; Vibration from rotation of the scanner motor. Countermeasures 1) Do not apply shock or vibration to the printer body. 2) Installation location should be appropriate with no possibility of shock or vibration. 3) Replace the optical unit 2 with a new one. (See Section 4.5.1 of Chapter VII.) I-12 Banding Phenomenon Banding line appears in the horizontal direction as shown in print sample (12) of Fig.8-2. Main Causes This is a transfer failure due to the shock caused when the OPC belt seam passes over the cleaning blade. Belt seam Countermeasures Fig.8-8 Replace the OPC belt cartridge with a new one. (See Section 2.1 of Chapter VI.)